Traffic sources: referring domain on join-link visits and joins (per-member table), click sources per campaign (surface or outside host)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

db.js

@@ -153,6 +153,14 @@ async function bootstrap() {
     ts BIGINT NOT NULL,
     INDEX (token, ts)
   ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4`);
+  await alterSafe('ALTER TABLE join_views ADD COLUMN ref VARCHAR(80) NULL'); // referring domain
+  await q(`CREATE TABLE IF NOT EXISTS click_sources (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    campaign_id INT NOT NULL,
+    src VARCHAR(80) NOT NULL,
+    ts BIGINT NOT NULL,
+    INDEX (campaign_id, ts)
+  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4`);
   await q(`CREATE TABLE IF NOT EXISTS visit_seen (
     campaign_id INT NOT NULL,
     email VARCHAR(190) NOT NULL,
@@ -218,6 +226,7 @@ async function bootstrap() {
     INDEX (stopped, next_at)
   ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4`);
   await alterSafe('ALTER TABLE accounts ADD COLUMN joined_via VARCHAR(20) NULL'); // ?v= angle the lead came in on
+  await alterSafe('ALTER TABLE accounts ADD COLUMN joined_ref VARCHAR(80) NULL'); // referring domain of the first join-page visit
   await alterSafe('ALTER TABLE accounts ADD COLUMN wall_offers VARCHAR(2000) NULL'); // JSON [{title,bannerUrl,targetUrl}] for wall positions 2-3 (unlock at 2 / 5 qualifying buyers)
 }